
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author fe500728
 */
public class AjoutMessage extends HttpServlet {

    String login = "";
    String message = "";

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        try {
           
            response.setContentType("text/xml");
            OutputStream os = response.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(os, "UTF-8");
            PrintWriter pw = new PrintWriter(osw);





        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //processRequest(request, response);
        String fPathMessage = request.getRealPath("index.jsp").replace("index.jsp", "message.xml");
        PrintWriter out = response.getWriter();
        try {
            login = request.getParameter("login");
            message = request.getParameter("message");
            addMessage(login, message, fPathMessage);
        
        } finally {
            out.close();
        }
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);


    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

    public void addMessage(String name, String Message, String fPathMessage) {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        try {
            if (!Message.equals("")) {
                DocumentBuilder db = dbf.newDocumentBuilder();
                Document doc = db.parse(fPathMessage.trim());

                Node n = doc.getElementsByTagName("messages").item(0);
                Node element = doc.createElement("message");
                ((Element) element).setTextContent(name + ": " + Message); //setAttribute("user", "value");
                n.appendChild(element);

              
                Source source = new DOMSource(doc);

               
                File file = new File(fPathMessage.trim());
                file.createNewFile();

                doc.setDocumentURI(doc.getDocumentURI().trim());
                file.setWritable(true);
                Result result = new StreamResult(file.toURI().getPath());

                
                Transformer xformer = TransformerFactory.newInstance().newTransformer();
                xformer.transform(source, result);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}